If you have performance problems and have a computer from DELL with MediaDirect installed. Try to uninstall the plugin for Outlook. Run the .msi file in C:\Program Files\DELL\MediaDirect\OlAddin, choose to remove the plugin. This plugin also caused some very annoying folders (outlook calendar and outlook contacts) to be created everywhere. It also made the texteditor (when writing a new mail) very slow. I hope this will help someone!